Near optimal performance joint semi-blind channel estimation and data detection techniques for Alamouti coded single-carrier (SC) MIMO communication systems

作     者：Bhalani, J. K. Chauhan, D. Kosta, Y. P. Trivedi, A. I. 

作者机构：Charotar Univ Sci & Technol Dept Elect & Commun Engn Changa 388421 Gujarat India Marwari Grp Inst Rajkot Gujarat India MS Univ Fac Technol Dept Elect Engn Baroda Gujarat India 

出 版 物：《PHYSICAL COMMUNICATION》 (实体层通信)

年 卷 期：2013年第8卷

页      面：31-37页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：Multiple-input multiple-output Orthogonal pilot maximum likelihood Rotation optimization maximum likelihood Householder QR decomposition Singular value decomposition Channel estimation 

摘      要：In this paper, two novel joint semi-blind channel estimation and data detection techniques are proposed and investigated for Alamouti coded single-carrier (SC) multiple-input multiple-output (MIMO) communication system using Rayleigh flat fading channel model. In the first novel semi-blind technique, blind channel estimation can be performed by using singular value decomposition (SVD) of received output autocorrelation matrix and training based channel estimation for orthogonal training symbols can be performed by using orthogonal pilot maximum likelihood (OPML) algorithm. Further using, that semi-blind channel estimate and received output, data detection is performed by using Maximum likelihood (ML) detection. Finally we derived new training symbols from error covariance matrix of estimated data and known orthogonal training symbols, which further applied to OPML algorithm for final channel estimate. In the second novel semi-blind technique, blind channel estimation can be performed by using matrix triangularization based on householder QR decomposition (H-QRD) of received output autocorrelation matrix instead of SVD decomposition. Other steps are same as the first novel technique to calculate data detection and final channel estimation. Simulation results are presented under 2-PSK, 4-PSK, 8-PSK and 16-QAM data modulation schemes using 2 transmitters and different combinations of receiver antennas to investigate the performances of novel techniques compare to conventional whitening rotation (WR) and rotation optimization maximum likelihood (ROML) based semi-blind channel estimation techniques. Result demonstrates that novel techniques outperform others by achieving near optimal performance. (C) 2013 Elsevier B.V. All rights reserved.